OBJECTIVE: To determine whether immature spermatids increase in semen in
response to hormonal contraceptive treatments. Such a finding would
support the existence of a defect in spermiogenesis, which in turn ...

Human male hormonal contraceptive regimens do not consistently induce
azoospermia, and the basis of this variable response is unclear. This
study used nine adult macaque monkeys (Macaca fascicularis) given
...

Germ cell and Sertoli cell numbers were estimated in six normal adult
monkeys (Macaca fascicularis) using a contemporary unbiased and efficient
stereological method--the optical disector. The data was used ...